3/7, 2/5, 9/14, 11/10a) 1/6 , 1/8 ---mmc(6,8) =24
4/24 , 3/24
b) 3/8, 5/6, 7/12 ---mmc(8,6,12) =24
9/24 , 20/24 , 14/24
c) 3/4, 5/18, 2/9, 1/6 ---mmc(4,18,9,6) =36
27/36 , 10/36, 8/36 , 6/36
d) 3/7, 2/5, 9/14, 11/10 ---mmc(7,5,14,10) =70
30/70 , 28/70 , 45/70, 77/70
e) 7/20, 14/15, 9/10, 11/30 ---- mmc(20,15, 10, 30) = 60
21/60 , 56/60 , 54/60 , 22/60
